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(No Model.)

T. V. ALLIS. MANUFACTURE OF BARBBD METALLIC FENCING.

Patented Feb. 27

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' it appears when finished.

ilivrrnn STATES PATE T OFFICE.

THOMAS V. ALLIS, OF NEXV YORK, N. Y.

MANUFACTURE OF BARBED METALLIC FENCING.

I SPECIFICATION forming part of Letters Patent No. 272,934, datedFebruary 27, 1883.

Application filed August 23, 1881. Renewed September 21, 1882. (Nomodel.)

To all whom it may concern:

,, Be it known that I, THOMAS V. ALLIS, of the city, county, and Stateof New York, have invented a new and useful Improvement in Manufactureof Barbed Metallic Fencing, of which the following is a specification.

This invention relates to the manufacture of barbed metallic fencing bycutting and binding ribs formed on the side of a metallic strip; and itconsists of an improved method of, also improved machinery for, formingsaid ribs preparatory to the cutting and bending thereof to form thebarbs, as hereinafter described, reference being had to theaccompanyingdrawings, in which-- Figure 1 is partly a sectionalelevation and partly a side elevation of rolls employed in forming theprojecting ribs. It also shows a side view of the strip. Fig. 2represents the rolls in front elevation. It also shows a crossseeiion ofthe strip through one of the ribs when complete. Fig. 3 is a transversesection of the strip, showing the form into which it is previously drawnpreparatory to subjecting it to the rolls. Fig. 4 is a section of thestrip through one of the ribs, after passing through the first rolls andbefore being creased. Fig. 5 is a top view of a section of the strip asit appears after the ribs are formed on it. Fig. 6 is a top view of thesame as it appears after the barbs are formed from the ribs. Fig. 7 is aside View of the barbed and twisted strip as Forming the barbs andtwisting the barbed strip, as indicated in Figs. 6 and 7, form no partof this invention, these figures being introduced to present moreclearly the object of forming the ribs, which is the subject of theinvention. Said ribs are represented at A in the form of short andratherthickfln-like project-ions located at certain predetermineddiswith slightly-rounded corners, represented in Fig. 3, preferably bythe drawing process, although it may be done in rolls, if desired, andthen pass it through the flattening-collar and groove-rolls E F, ofwhich the roll F has a short recess, G, in a portion ofthe bottom ofthemain flattening-groove F, the strip being so guided that one ofitsangles is presented to the bottom of the groove F and one of its flatsides to the collar E of roll E, so that where the groove G passes onthe strip a short rib, A, will be formed out of the angular side, whilethe rest will be flattened down between said ribs to the uniform flatshape with rounded edges, as shown in Figs. 4:, 5, and 6. From rolls EF, I pass the strip thus flattened and ribbed between the rolls H, eachhaving a groove, I, for the edges of the strip and a creasing die orcollar, J, for making a crease or groove on each side of the ribs closeto the surface of the strip, as "shown in Fig. 2, to shape the ribs innearly round form, which is preferred for the barbs, and to partiallysever the barbs from the strip to facilitate the subsequent cuttingoperation by which said barbs are cut a certain portion of their lengthfrom the strip and bent out in the projecting form shown in Figs. 6 and7. The rolls H are to be arranged in suitable relation to rolls E F, asindicatedin the drawings, to receive the strip from them, and the latterwill be arranged in relation to the furnace to receive the heated striptherefrom, so that both operations will be accomplished with one heat,and also one handling.

It will be readily seen by those skilled in the art, that considerableadvantage is obtained in the forming of the ribs in rolls E F by firstreducing the rod to triangular form instead of rolling the ribs out ofthe round shape, because in this case the work of the rolls consistsmainly of flattening the angle between the ribs, and simply leavingportions of the angle for them in about the shape of the said angle asproduced by the drawing mechanism, so that but very little metal has tobe displaced along the sides of the ribs where it is difficult todisplace and hard on the rolls,

whereas if the ribs were shaped wholly out of rco the round rod by therolls the service would be much more wearing on .the rolls, also moreexpensive, and the ribs would not be as perfectly formed. Likewise, bythe subsequent creasing or grooving of the sides of theribs, it is plainthat besides the more oval or round and better form for the barbs thusobtained the operation of shearing the points from the body of the stripis greatly facilitated. If preferred, the creasing of the ribs may beeffected by means of squeezing and hammer dies or by milling; but I donot limit myself to the preparatory shaping of the strips in triangularform in cross-section in the making of the projecting ribs.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

1. Rolls for forming short longitudinal ribs projecting from the sidesof metallic strips at intervals along the same, said ribs being of lessbreadth from side to side than said strips, having die-groove F with oneor more pointed recesses, G, centrally located in the bottom thereof ofless breadth in cross-section than the breadth of the groove,substantially as described.

The improvementin the manufacture of ribbed metallic strips for barbedfencing, consisting of, first, drawing or otherwise shaping the rods intriangular or approximately triangular form in cross-section, and,second, rolling the same on one flat side and one angle in flatteningpasses or grooves E F, wherein is a rib-recess, G, to act on the angularside of said strip and complete the form of the ribs, substantially asdescribed.

3. The improvement in the manufacture of ribbed metallic strips forbarbed fencing, consisting of, first, drawing or otherwise shaping therods in triangular or approximately triangular form in cross-section;second, rolling the same on one flat side andbne angle in flatteningpasses or grooves E F, wherein is a recess, G, acting on the angularside of the strips and completing the form of the ribs, as described;and,third,creasingorgroovingthe sides of the ribs, substantially asdescribed.

4. The combination, with collar and groove rolls E F, having recess G,of creasing-rolls H, having grooves I, and creasing-dies J,substantially as described.

THOMAS V. ALLIS.

Vitnesses:

W. J. MORGAN, S. H. lVIORGAN.

